Золь-гель синтез люминесцентного материала на основе алюмината кальция Сa12Al14O33:Eu, Nd Л. А. Селюнина, Т. В. Брославская, Л. Н. Мишенина
Material type:
ArticleOther title: Zol-gel synthesis of luminescent material based on calcium aluminate Сa12Al14O33:Eu, Nd [Parallel title]Subject(s): золь-гель синтез | алюминат кальция | люминофоры | люминесцентные материалыGenre/Form: статьи в сборниках Online resources: Click here to access online
In:
Полифункциональные химические материалы и технологии. [Т. 1] : материалы Международной научной конференции, 22-25 мая 2019 г Т. 1. С. 136-138Abstract: Сalcium aluminate Ca12Al14O33 and phosphors based on it were obtained using sol-gel technology. Complex studies
were used to identify the dynamics of phase and structural transformations in the synthesis of Ca12Al14O33. The main
stages of the calcium aluminate formation were determined using thermal analysis, IR spectroscopy and X-ray phase
analysis. Solid-phase interaction in the formation of Ca12Al14O33 includes the steps of obtaining calcium carbonate and
amorphous alumina (800 °C), aluminates of composition Ca3Al2O6 and CaAl2O4 (900–1000 °C), Ca5Al6O14 and
Ca4Al6O13 (1000–1100 °C). Ca12Al14O33 begins to form at 1100 °C. The graphic image of the structure was constructed
according to the obtained atomic coordinates using the ReX Powder diffraction program. Luminescent properties of the phosphors of the composition Ca12-(0,05+x)Al14O33 : NdxEu0,05 (x = 0,025–0,1) were investigated. It was determined that
the highest intensity of luminescence is achieved at x = 0,05. With a further increase in the content of neodyum, there
was a concentration quenching of the luminescence.
Библиогр.: 5 назв.
Сalcium aluminate Ca12Al14O33 and phosphors based on it were obtained using sol-gel technology. Complex studies
were used to identify the dynamics of phase and structural transformations in the synthesis of Ca12Al14O33. The main
stages of the calcium aluminate formation were determined using thermal analysis, IR spectroscopy and X-ray phase
analysis. Solid-phase interaction in the formation of Ca12Al14O33 includes the steps of obtaining calcium carbonate and
amorphous alumina (800 °C), aluminates of composition Ca3Al2O6 and CaAl2O4 (900–1000 °C), Ca5Al6O14 and
Ca4Al6O13 (1000–1100 °C). Ca12Al14O33 begins to form at 1100 °C. The graphic image of the structure was constructed
according to the obtained atomic coordinates using the ReX Powder diffraction program. Luminescent properties of the phosphors of the composition Ca12-(0,05+x)Al14O33 : NdxEu0,05 (x = 0,025–0,1) were investigated. It was determined that
the highest intensity of luminescence is achieved at x = 0,05. With a further increase in the content of neodyum, there
was a concentration quenching of the luminescence.
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